# Re: \[Bugme-new\] \[Bug 30462\] New: High cpu usage when someone sends many ipv6 udp packages

- From: Ernst Sjöstrand \<hidden\>
- Date: 2011-03-07 19:54:22 
- List: netdev
- Page: https://ratatoskr.run/netdev/2011/03/10865877
- Thread: https://ratatoskr.run/netdev/2011/03/10865877/t.md

```text
Hi,

seems like reverting "ipv6: Always clone offlink routes." fixes the issue.

Regards
//Ernst

2011/3/5 Ernst Sjöstrand [ref]:
> I've only used precompiled kernels so far so I don't have stuff set up to
> compile kernels right now,
> probably won't have time to do that this weekend. Not tonight in GMT+1
> anyway!
>
> Regards
> //Ernst
>
> On Sat, Mar 5, 2011 at 02:21, David Miller [ref] wrote:
>>
>> From: Andrew Morton <akpm@linux-foundation.org>
>> Date: Fri, 4 Mar 2011 17:15:06 -0800
>>
>> >> The following ipv6 related changes were introduced between -rc2 and
>> >> -rc3 that I
>> >> can see. The "Revert 'administrative down' address handling changes."
>> >> looked
>> >> big...
>> >>       ipv6: Always clone offlink routes.
>> >>       ipv6: Revert 'administrative down' address handling changes.
>>
>> Can we narrow it down to which of those two changes introduced the
>> regression?
>>
>> We have another issue, still open, which is caused by the first
>> change, so maybe try reverting that one first.
>>
>> Thanks.
>
>
```